US5382205A — Control device for an internal combustion engine …

Claim 1

Independent Claim 255 words

A control device for controlling an internal combustion engine and a continuously variable transmission, the continuously variable transmission transmitting power between the internal combustion engine and driving wheels, and having a continuously changeable transmission ratio, said control device comprising: driving condition detecting means for detecting driving conditions of said vehicle; objective transmission ratio setting means for setting an objective transmission ratio for said continuously variable transmission according to the driving condition detected by the driving condition detecting means; transmission ratio detecting means for detecting an actual transmission ratio of said continuously variable transmission; transmission ratio deviation calculating means for calculating a deviation between the objective transmission ratio set by said objective transmission ratio setting means and the actual transmission ratio detected by said transmission ratio detecting means; transmission ratio changing speed setting means for setting a transmission ratio changing speed which is a changing rate of the transmission ratio according to the transmission ratio deviation calculated by said transmission ratio deviation calculating means; transmission controlling means for controlling said continuously variable transmission to obtain the transmission ratio changing speed set by said transmission ratio changing speed setting means; transmission auxiliary torque calculating means for calculating a transmission auxiliary torque which is consumed during a transmission operation of said continuously variable transmission based on the transmission changing ratio speed set by said transmission ratio changing speed setting means; and internal combustion engine controlling means for controlling output of the internal combustion engine according to the transmission auxiliary torque calculated by the transmission auxiliary torque calculating means.

Claim 2

Dependent Claim 255 words

A control device for controlling an internal combustion engine and a continuously variable transmission, the continuously variable transmission transmitting power between the internal combustion engine and driving wheels, and having a continuously changeable transmission ratio, said control device comprising: driving condition detecting means for detecting driving conditions of said vehicle; objective transmission ratio setting means for setting an objective transmission ratio for said continuously variable transmission according to the driving condition detected by the driving condition detecting means; transmission ratio detecting means for detecting an actual transmission ratio of said continuously variable transmission; transmission ratio deviation calculating means for calculating a deviation between the objective transmission ratio set by said objective transmission ratio setting means and the actual transmission ratio detected by said transmission ratio detecting means; transmission ratio changing speed setting means for setting a transmission ratio changing speed which is a changing rate of the transmission ratio according to the transmission ratio deviation calculated by said transmission ratio deviation calculating means; transmission controlling means for controlling said continuously variable transmission to obtain the transmission ratio changing speed set by said transmission ratio changing speed setting means; transmission auxiliary torque calculating means for calculating a transmission auxiliary torque which is consumed during a transmission operation of said continuously variable transmission based on the transmission changing ratio speed set by said transmission ratio changing speed setting means; and internal combustion engine controlling means for controlling output of the internal combustion engine according to the transmission auxiliary torque calculated by the transmission auxiliary torque calculating means.

Claim 3

Dependent Claim 209 words

A control device as claimed in claim 1, wherein said internal combustion engine comprises, in its suction system, intake air flow adjusting means, which is controllable independent of the operation of a driver-operable member, for adjusting an amount of air delivered by said suction system to said engine, and wherein said driving condition detecting means comprises acceleration requirement detecting means for detecting an operational amount of said driver-operable member as acceleration requirement information of a driver, said objective transmission ratio setting means sets said objective transmission ratio according to the operational amount of said driver-operable member detected by said acceleration requirement detecting means, said internal combustion engine controlling means comprises, required torque setting means for setting required torque, according to the operational amount of said driver-operable member detected by said acceleration requirement detecting means, as torque which is necessary for acceleration required by said driver; objective engine torque setting means for setting objective engine torque according to the required torque set by said required torque setting means and the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means; and engine torque controlling means for controlling said intake air flow adjusting means so as to obtain the objective engine torque set by said objective engine torque setting means.

Claim 4

Dependent Claim 73 words

A control device as claimed in claim 2, wherein said objective engine torque setting means divides torque obtained by adding the required torque set by said required torque setting means to the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means into first torque, which the engine can actually output, and second torque, which is torque other than said first torque, and sets said first torque as the objective engine torque.

Claim 5

Dependent Claim 45 words

A control device as claimed in claim 3, wherein said transmission ratio changing speed setting means further comprises transmission ratio changing speed correcting means for correcting the transmission ratio changing speed set by said transmission ratio changing speed setting means according to said second torque.

Claim 6

Dependent Claim 27 words

A control device as claimed in claim 2, wherein said driver-operable member is an accelerator pedal, and said intake air flow adjusting means is a throttle valve.

Claim 7

Dependent Claim 123 words

A control device as claimed in claim 1, wherein said internal combustion engine comprises, in its suction system, intake air flow adjusting means, which is controllable independent of the operation of a driver-operable member, for adjusting an amount of air delivered by said suction system to said engine, said internal combustion engine controlling means comprises: auxiliary intake air flow setting means for calculating auxiliary intake air flow which is necessary for obtaining said transmission auxiliary torque according to the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means; and auxiliary intake air flow controlling means for controlling said intake air flow adjusting means so as to obtain the auxiliary intake air flow set by said auxiliary intake air flow setting means.

Claim 8

Dependent Claim 47 words

A control device as claimed in claim 6, wherein said transmission ratio changing speed setting means further comprises transmission ratio changing speed correcting means for correcting said transmission ratio changing speed according to the auxiliary intake air flow set by said auxiliary intake air flow setting means.

Claim 9

Dependent Claim 43 words

A control device as claimed in claim 7, wherein said transmission ratio changing speed correcting means corrects said transmission ratio changing speed when the auxiliary intake air flow set by said auxiliary intake air flow setting means is larger than a predetermined value.

Claim 10

Dependent Claim 84 words

A control device as claimed in claim 7, wherein said transmission ratio changing speed correcting means corrects said transmission ratio changing speed only when it judges that the auxiliary intake air flow set by said auxiliary intake air flow setting means is larger than a first predetermined value and is smaller than a second predetermined value, which is larger than said first predetermined value, and corrects said transmission ratio changing speed when said auxiliary intake air flow is larger than said second predetermined value.

Claim 11

Dependent Claim 38 words

A control device as claimed in claim 6, wherein said intake air flow adjusting means is an idling speed controlling valve for opening and closing a bypass formed by means of bypassing a throttle valve of said engine.

Claim 12

Dependent Claim 172 words

A control device as claimed in claim 1, wherein said internal combustion engine further comprises: intake air flow adjusting means, which is disposed in a suction system and is actuated by operating a driver-operable member; fuel supply means for adjusting a fuel supply amount for said internal combustion engine; igniting means for igniting said internal combustion engine, and wherein said driving condition detecting means comprises acceleration requirement detecting means for detecting an operational amount of said driver-operable member as acceleration requirement information of said driver, said objective transmission ratio setting means sets said objective transmission ratio according to the operational amount of said driver-operable member detected by said acceleration requirement means, and said internal combustion engine controlling means comprises first engine torque controlling means for setting an objective air fuel ratio and an objective spark timing according to the transmission auxiliary torque calculated by said auxiliary torque calculating means, controls said fuel supply means according to said objective air fuel ratio, and controls said igniting means according to said objective spark timing.

Claim 13

Dependent Claim 103 words

A control device as claimed in claim 11, wherein said fuel supply means cuts off fuel supply to one or more cylinder(s) of a plurality of cylinders, thereby to rest said one or more cylinder(s), and said first engine torque controlling means sets the objective air fuel ratio richer than the current air fuel ratio when the transmission auxiliary torque calculated by said transmission auxiliary toque calculating means is larger than zero, and sets the number of cylinders to rest and the objective spark timing according to said transmission auxiliary torque when said transmission auxiliary torque is equal to or smaller than zero.

Claim 14

Dependent Claim 65 words

A control device as claimed in claim 12, wherein said first engine torque controlling means sets the objective air fuel ratio richer than the current air fuel ratio only when (1) an air fuel ratio which is richer than the current air fuel ratio can be obtained and (2) the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means is larger than zero.

Claim 15

Dependent Claim 117 words

A control device as claimed in claim 11, wherein said internal combustion engine controlling means further comprises: required torque setting means for setting required torque, according to the operational amount of said driver-operable member detected by said acceleration requirement detecting means, as torque which is necessary for acceleration required by said driver; objective engine torque setting means for setting objective engine torque according to the required torque set by said required torque setting means and the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means; and second engine torque controlling means for controlling said intake air flow adjusting means so as to obtain the objective engine torque set by said objective engine torque setting means.

Claim 16

Dependent Claim 126 words

A control device as claimed in claim 14, wherein said first engine torque controlling means sets the objective air fuel ratio richer than the current air fuel ratio when the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means is larger than zero, determines the difference between power torque of the engine, which is estimated from the current intake air flow, and the objective engine torque calculated by said objective engine torque calculating means as a required torque reduction amount, and determines both the number of cylinders to rest and the objective spark timing, which is a spark retard amount, of said internal combustion engine according to said required torque reduction amount when said transmission auxiliary torque is equal to or smaller than zero.

Claim 17

Dependent Claim 36 words

A control device as claimed in claim 15, wherein said first engine torque controlling means sets the objective spark timing according to a deviation between said required torque reduction amount and torque reduced by resting cylinder(s).

Claim 18

Dependent Claim 25 words

A control device as claimed in claim 16, wherein said first engine torque controlling means restricts said objective spark timing within a predetermined allowable range.

Claim 19

Dependent Claim 57 words

A control device as claimed in claim 17, wherein said transmission ratio changing speed setting means comprises transmission ratio changing speed correcting means for correcting said transmission ratio changing speed according to a spark retard amount which is lacking by restricting said objective spark timing within the predetermined allowable range by said first engine torque controlling means.

Claim 20

Dependent Claim 27 words

A control device as claimed in claim 11, wherein said driver-operable member is an accelerator pedal, and said intake air flow adjusting means is a throttle valve.

Claim 21

Dependent Claim 230 words

A control device as claimed in claim 1, wherein said internal combustion engine comprises, in its suction system, intake air flow adjusting means, which is controllable independent of the operation of a driver-operable member, for adjusting an amount of air delivered by said suction system to said engine, and wherein said driving condition detecting means comprises operational amount detecting means for detecting an operational amount of said driver-operable member, said internal combustion engine controlling means comprises, required output detecting means for obtaining required output information of said driver according to the operational amount of said driver-operable member detected by said operational amount detecting means; required torque setting means for setting required torque corresponding to the required output information of said driver and for setting an objective engine speed according to the required output information obtained by said required output detecting means; objective engine torque calculating means for setting an objective engine torque according to the required torque set by said required torque setting means and the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means; and engine torque controlling means for controlling said intake air flow adjusting means so as to obtain the objective engine torque set by said objective engine torque setting means, said objective transmission ratio setting means sets said objective transmission ratio according to the objective engine speed set by said required torque setting means.

Claim 22

Dependent Claim 44 words

A control device as claimed in claim 20, wherein said objective transmission ratio setting means restricts said objective transmission ratio within an allowable range when judging the objective transmission ratio set in accordance with said objective engine speed is not in said allowable range.

Claim 23

Dependent Claim 77 words

A control device as claimed in claim 21, wherein said objective transmission ratio setting means sets a modified engine speed corresponding to the objective transmission ratio when restricting said objective transmission ratio within said allowable range, and said required torque setting means sets a modified required torque as said required torque according to the required output information obtained by said required output detecting means and the modified engine speed set by said objective transmission ratio setting means.

Claim 24

Dependent Claim 165 words

A control device as claimed in claim 21, wherein said objective engine torque calculating means restricts said objective engine torque within said allowable torque range when the objective engine torque obtained according to the required torque set by said required torque setting means and the transmission auxiliary torque calculated by said transmission auxiliary torque calculating means is not in a predetermined allowable torque range; and said transmission ratio changing speed setting means comprises, transmission ratio changing speed temporarily setting means for setting a temporal transmission ratio changing speed according to the transmission ratio deviation calculated by said transmission ratio deviation calculating means, and transmission ratio changing speed correcting means for correcting said transmission ratio changing speed based on a subtracted torque, which is an amount of torque lacking when said objective engine torque is restricted within said predetermined allowable torque range by said objective engine torque calculating means, and said temporal transmission ratio changing speed set by said transmission ratio changing speed temporarily setting means.

Claim 25

Dependent Claim 92 words

A control device as claimed in claim 23, wherein said transmission ratio changing speed correcting means calculates, according to said temporal transmission ratio changing speed, a transmission shock index which represents degree of transmission shock, and determines the transmission ratio changing speed by correcting said temporal transmission ratio changing speed according to said subtracted torque when said transmission shock index is not in a predetermined allowable range, and determines said temporal transmission ratio changing speed as the transmission ratio changing speed when said transmission shock index is in said predetermined allowable range.

Claim 26

Dependent Claim 27 words

A control device as claimed in claim 20, wherein said driver-operable member is an accelerator pedal, and said intake air flow adjusting means is a throttle valve.

Claim 27

Dependent Claim 67 words

A control device as claimed in claim 1, wherein said internal combustion engine controlling means comprises: required torque setting means for setting a required torque based on said detected driving conditions; objective engine torque setting means for setting an objective engine torque based on said required torque and said transmission auxiliary torque; and engine torque controlling means for controlling engine output according to said objective engine torque.

Claim 28

Dependent Claim 102 words

A control device as claimed in claim 26, wherein said driving condition detecting means includes acceleration requirement detecting means for detecting, as an acceleration requirement, an operational amount of a driver operable member; said required torque setting means sets said required torque based on said acceleration requirement; and said objective engine torque setting means includes adding means for adding said required torque to said transmission auxiliary torque to obtain an intermediate objective engine torque, and setting means for setting said objective engine torque based on said intermediate objective engine torque and for setting an undertorque based on said intermediate objective engine torque.

Claim 29

Dependent Claim 80 words

A control device as claimed in claim 27, wherein said transmission ratio changing speed calculating means comprises: intermediate transmission ratio changing speed determining means for determining an intermediate transmission ratio changing speed from said objective transmission ratio; subtraction value calculating means for calculating a transmission ratio changing speed subtraction value based on said undertorque; and a subtractor for subtracting said transmission ratio changing speed subtraction value from said intermediate transmission ratio changing speed to produce said transmission ratio changing speed.

Claim 30

Dependent Claim 55 words

A control device as claimed in claim 28, wherein said required torque setting means reads said required torque from a first data map based on said acceleration requirement, and said intermediate transmission ratio changing speed determining means reads said intermediate transmission ratio changing speed from a second data map based on said objective transmission ratio.

Claim 31

Dependent Claim 102 words

A control device as claimed in claim 26, wherein said internal combustion engine controlling means further comprises: transmission auxiliary torque comparison means for determining whether said transmission auxiliary torque is greater than zero; air fuel determining means for determining whether an air fuel ratio of said engine can be increased when said transmission auxiliary torque comparison means determines that said transmission auxiliary torque is greater than zero; and fuel injector controlling means for controlling a fuel injection valve to increase said air fuel ratio when said air fuel determining means determines that said air fuel ratio of said engine can be increased.

Claim 32

Dependent Claim 73 words

A control device as claimed in claim 30, wherein said driving condition detecting means includes intake air flow detecting means for detecting an intake air flow amount of said engine; and said air fuel determining means determines an increase torque amount based on said intake air flow amount, and determines that said air fuel ratio of said engine can be increased when said increase torque amount is greater than said transmission auxiliary torque.

Claim 33

Dependent Claim 92 words

A control device as claimed in claim 26, wherein said internal combustion engine controlling means further comprises: transmission auxiliary torque comparison means for determining whether said transmission auxiliary torque is greater than zero; fuel cut setting means for setting a fuel cut number when said transmission auxiliary torque comparison means determines that said transmission auxiliary torque is not greater than zero; and fuel control means for controlling fuel injectors of said engine to cut the supply of fuel to a number of cylinders in said engine equal to said fuel cut number.

Claim 34

Dependent Claim 63 words

A control device as claimed in claim 32, wherein said driving condition detecting means includes intake air flow detecting means for detecting an intake air flow amount of said engine; and said fuel cut setting means calculates an expected torque based on said intake air flow amount, and determines said fuel cut number based on said expected torque and said objective engine torque.

Claim 35

Dependent Claim 65 words

A method as claimed in claim 32, wherein said internal combustion engine controlling means further comprises: spark retardation setting means for setting a spark retardation amount based on said fuel cut number when said transmission auxiliary comparison means determines that said transmission auxiliary torque is not greater than zero; and ignition control means for controlling ignition of said engine according to said spark retardation amount.

Claim 36

Dependent Claim 76 words

A control device as claimed in claim 26, wherein said internal combustion engine controlling means further comprises: transmission auxiliary torque comparison means for determining whether said transmission auxiliary torque is greater than zero; spark retardation setting means for setting a spark retardation amount when said transmission auxiliary comparison means determines that said transmission auxiliary torque is not greater than zero; and ignition control means for controlling ignition of said engine according to said spark retardation amount.

Claim 37

Dependent Claim 56 words

A method as claimed in claim 35, wherein said transmission ratio changing speed setting means comprises: first means for calculating an intermediate transmission ratio changing speed based on said objective transmission ratio; and correcting means for correcting said intermediate transmission ratio changing speed to produce said transmission ratio changing speed based on said spark retardation amount.

Claim 38

Dependent Claim 69 words

A control device as claimed in claim 26, wherein said internal combustion engine controlling means includes required output calculating means for calculating a required output corresponding to said detected driving conditions; said required torque setting means sets said required torque based on said required output; and said internal combustion engine controlling means further includes correcting means for correcting said required output based on said objective transmission ratio changing speed,

Claim 39

Dependent Claim 44 words

A control device as claimed in claim 37, wherein said driving condition detecting means includes actuation detecting means for detecting an operation amount of a driver operable member; and said required output calculating means calculates said required output based on said detected operation amount.

Claim 40

Dependent Claim 145 words

A control device as claimed in claim 26, wherein said required torque calculating means comprises: maximum torque determining means for determining a maximum spare torque based on said detected driving conditions; actual torque calculating means for calculating an actual torque based on said detected driving conditions; comparison torque calculating means for calculating a comparison torque based on said actual torque and said transmission auxiliary torque; determining means for determining whether said comparison torque is smaller than said maximum spare torque; objective engine torque calculating means for calculating said objective engine torque from said required torque and said transmission auxiliary torque when said determining means determines that said comparison torque is smaller than said maximum spare torque, and for determining said objective engine torque as said maximum spare torque when said determining means determines that said comparison torque is not smaller than said maximum spare torque.

Claim 41

Dependent Claim 58 words

A control device as claimed in claim 26, wherein said driving condition detecting means includes a water temperature sensor for detecting a temperature of water used by said engine; and said internal combustion engine controlling means includes torque correcting means for correcting said objective engine torque based on a detected water temperature to produce said objective engine torque.

Claim 42

Dependent Claim 64 words

A control device as claimed in claim 1, wherein said internal combustion engine control means comprises: auxiliary intake air flow means for setting an auxiliary intake air flow based on said transmission auxiliary torque; and auxiliary intake air flow control means for controlling an intake air flow means, which adjusts an amount of air flow no the engine, based on said auxiliary intake airflow.

Claim 43

Dependent Claim 126 words

A control device as claimed in claim 41, wherein said transmission ratio changing speed setting means comprises: intermediate transmission ratio changing speed determining means for determining an intermediate transmission ratio changing speed based on said objective transmission ratio; and transmission ratio changing speed correcting means for calculating a transmission ratio changing speed correction amount when said auxiliary intake air flow is greater than a first threshold, for correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount is calculated, and for determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 44

Dependent Claim 160 words

A control device as claimed in claim 41, wherein said transmission ratio changing speed setting means comprises: intermediate transmission ratio changing speed determining means for determining an intermediate transmission ratio changing speed based on said objective transmission ratio; and transmission ratio changing speed correcting means for calculating an estimated value of suction pipe negative pressure for a suction pipe of said engine when said auxiliary intake air flow is less than a first threshold and greater than a second threshold, for calculating said transmission ratio changing speed correction amount when said estimated value is greater than a predetermined estimated threshold, for correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount is calculated, and for determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 45

Dependent Claim 181 words

A control device as claimed in claim 41, wherein said transmission ratio changing speed setting means comprises: intermediate transmission ratio changing speed determining means for determining an intermediate transmission ratio changing speed based on said objective transmission ratio; and transmission ratio changing speed correcting means for calculating a transmission ratio changing speed correction amount when said auxiliary intake air flow is greater than a first threshold, for calculating an estimated value of suction pipe negative pressure for a suction pipe of said engine when said auxiliary intake air flow is less than said first threshold and greater than a second threshold, for calculating said transmission ratio changing speed correction amount when said estimated value is greater than a predetermined estimated threshold, for correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount is calculated, and for determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 46

Dependent Claim 140 words

A control device as claimed in claim 1, wherein said transmission ratio changing speed setting means comprises: temporal transmission determining means for determining a temporal transmission ratio changing speed based on said objective transmission ratio; transmission shock calculating means for calculating a transmission shock index, representing a degree of transmission shock, from said temporal transmission ratio changing speed; first determining means for determining if said transmission shock index is within an allowable range; transmission ratio changing speed calculating means for calculating said transmission ratio changing speed based on said actual transmission ratio when said first determining means determines that said transmission shock index is not within said allowable range, and for determining said transmission ratio changing speed as said temporal transmission ratio changing speed when said first determining means determines that said transmission shock index is within said allowable range.

Claim 47

Dependent Claim 168 words

A control device as claimed in claim 45, wherein said maximum torque determining means for determining a maximum spare torque based on said detected driving conditions; actual torque calculating means for calculating an actual torque based on said detected driving conditions; comparison torque calculating means for calculating a comparison torque based on said actual torque and said transmission auxiliary torque; second determining means for determining whether said comparison torque is smaller than said maximum spare torque; objective engine torque calculating means for calculating said objective engine torque from said required torque and said transmission auxiliary torque when said second determining means determines that said comparison torque is smaller than said maximum spare torque, and for determining said objective engine torque as said maximum spare torque when said second determining means determines that said comparison torque is not smaller than said maximum spare torque; and undertorque calculating means for calculating an undertorque when said determining means determines that said comparison torque is not smaller than said maximum spare torque.

Claim 48

Dependent Claim 49 words

A control device as claimed in claim 46, wherein said transmission ratio changing speed calculating means calculates said transmission ratio changing speed based on said actual transmission ratio changing speed and said undertorque when said determining means determines that said transmission shock index is not within said allowable range.

Claim 49

Independent Claim 153 words

A method for controlling an internal combustion engine and a continuously variable transmission, the continuously variable transmission transmitting output from said internal combustion engine to driving wheels, and having a continuously changeable transmission ratio, said method comprising the steps of: (a) detecting driving conditions of said vehicle; (b) setting an objective transmission ratio for said continuously variable transmission according to said detected driving condition; (c) detecting an actual transmission ratio of said continuously variable transmission; (d) calculating a deviation between said objective transmission ratio and said actual transmission ratio; (e) setting a transmission ratio changing speed according to said transmission ratio deviation; (f) controlling said continuously variable transmission to obtain said transmission ratio changing speed; (g) calculating a transmission auxiliary torque which is consumed during a transmission operation of said continuously variable transmission based on said transmission ratio changing speed; and (h) controlling output of said engine according to said transmission auxiliary torque.

Claim 50

Independent Claim 153 words

A method for controlling an internal combustion engine and a continuously variable transmission, the continuously variable transmission transmitting output from said internal combustion engine to driving wheels, and having a continuously changeable transmission ratio, said method comprising the steps of: (a) detecting driving conditions of said vehicle; (b) setting an objective transmission ratio for said continuously variable transmission according to said detected driving condition; (c) detecting an actual transmission ratio of said continuously variable transmission; (d) calculating a deviation between said objective transmission ratio and said actual transmission ratio; (e) setting a transmission ratio changing speed according to said transmission ratio deviation; (f) controlling said continuously variable transmission to obtain said transmission ratio changing speed; (g) calculating a transmission auxiliary torque which is consumed during a transmission operation of said continuously variable transmission based on said transmission ratio changing speed; and (h) controlling output of said engine according to said transmission auxiliary torque.

Claim 51

Dependent Claim 53 words

A method as claimed in claim 48, wherein said step (h) comprises the steps of: (h1) setting a required torque based on said detected driving conditions; (h2) setting an objective engine torque based on said required torque and said transmission auxiliary torque; and (h3) controlling engine output according to said objective engine torque.

Claim 52

Dependent Claim 91 words

A method as claimed in claim 49, wherein said step (a) includes the step of (a1) detecting, as an acceleration requirement, an operational amount of a driver operable member; said step (h1) sets said required torque based on said acceleration requirement; and said step (h2) includes the steps of (h21) adding said required torque to said transmission auxiliary torque to obtain an intermediate objective engine torque, (h22) setting said objective engine torque based on said intermediate objective engine torque, and (h23) setting an undertorque based on said intermediate objective engine torque.

Claim 53

Dependent Claim 65 words

A method as claimed in claim 50, wherein said step (e) comprises the steps of: (e1) determining an intermediate transmission ratio changing speed from said objective transmission ratio; (e2) calculating a transmission ratio changing speed subtraction value based on said undertorque; and (e3) subtracting said transmission ratio changing speed subtraction value from said intermediate transmission ratio changing speed to produce said transmission ratio changing speed.

Claim 54

Dependent Claim 57 words

A method as claimed in claim 51, wherein said step (h1) includes the step of (h11) reading said required torque from a first data map based on said acceleration requirement, and said step (e1) includes the step of (e11) reading said intermediate transmission ratio changing speed from a second data map based on said objective transmission ratio.

Claim 55

Dependent Claim 52 words

A method as claimed in claim 48, wherein said step (h) comprises the steps of: (h1) setting an auxiliary intake air flow based on said transmission auxiliary torque; and (h2) controlling an intake air flow means, which adjusts an amount of air flow to the engine, based on said auxiliary intake airflow.

Claim 56

Dependent Claim 109 words

A method as claimed in claim 53, wherein step (e) comprises the steps of: (e1) determining an intermediate transmission ratio changing speed based on said objective transmission ratio; (e2) calculating a transmission ratio changing speed correction amount when said auxiliary intake air flow is greater than a first threshold; (e3) correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount ms calculated; and (e4) determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 57

Dependent Claim 153 words

A method as claimed in claim 53, wherein said stem (e) comprises the steps of: (e1) determining an intermediate transmission ratio changing speed based on said objective transmission ratio; (e2) calculating an estimated value of suction pipe negative pressure for a suction pipe of said engine when said auxiliary intake air flow is less than a first threshold and greater than a second threshold, said first threshold being greater than said second threshold; (e3) calculating a transmission ratio changing speed correction amount when said estimated value is greater than a predetermined estimated threshold; (e4) correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount is calculated; and (e5) determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 58

Dependent Claim 174 words

A method as claimed in claim 53, wherein said step (e) comprises the steps of: (e1) determining an intermediate transmission ratio changing speed based on said objective transmission ratio; (e2) calculating a transmission ratio changing speed correction amount when said auxiliary intake air flow is greater than a first threshold; (e3) calculating an estimated value of suction pipe negative pressure for a suction pipe of said engine when said auxiliary intake air flow is less than said first threshold and greater than a second threshold, said first threshold being greater than said second threshold; (e4) calculating said transmission ratio changing speed correction amount when said estimated value is greater than a predetermined estimated threshold; (e5) correcting said intermediate transmission ratio changing speed based on said transmission ratio changing speed correction amount to determine said transmission ratio changing speed when said transmission ratio changing speed correction amount is calculated; and (e6) determining said transmission ratio changing speed as said intermediate transmission ratio changing speed when said transmission ratio changing speed correction amount is not calculated.

Claim 59

Dependent Claim 83 words

A method as claimed in claim 49, wherein said stem (h) further comprises the steps of: (h4) determining whether said transmission auxiliary torque is greater than zero; (h5) determining whether an air fuel ratio of said engine can be increased when said step (h4) determines that said transmission auxiliary torque is greater than zero; and (h6) controlling a fuel injection valve to increase said air fuel ratio when said step (h8) determines that said air fuel ratio of said engine can be increased.

Claim 60

Dependent Claim 76 words

A method as claimed in claim 49, wherein said step (h) further comprises the steps of: (h4) determining whether said transmission auxiliary torque is greater than zero; (h5) setting a fuel cut number when said step (h4) determines that said transmission auxiliary torque is not greater than zero; and (h6) controlling fuel injectors of said engine to cut the supply of fuel to a number of cylinders in said engine equal to said fuel cut number.

Claim 61

Dependent Claim 61 words

A method as claimed in claim 49, wherein said step (h) further comprises the steps of: (h4) determining whether said transmission auxiliary torque is greater than zero; (h5) setting a spark retardation amount when said step (h4) determines that said transmission auxiliary torque is not greater than zero; and (h6) controlling ignition of said engine according to said spark retardation amount.

Claim 62

Dependent Claim 72 words

A method as claimed in claim 57, wherein said step (a) includes the step of (a1) detecting an intake air flow amount of said engine; and said step (h5) includes the steps of, (h52) determining an increase torque amount based on said intake air flow amount; and (h53) determining that said air fuel ratio of said engine can be increased when said increase torque amount is greater than said transmission auxiliary torque.

Claim 63

Dependent Claim 62 words

A method as claimed in claim 58, wherein said step (a) includes the step of (a1) detecting an intake air flow amount of said engine; and said step (h5) includes the steps of, (h52) calculating an expected torque based on said intake air flow amount; and (h53) determining said fuel cut number based on said expected torque and said objective engine torque.

Claim 64

Dependent Claim 56 words

A method as claimed in claim 58, wherein said step (h) further comprises the steps of: (h7) setting a spark retardation amount based on said fuel cut number when said step (h4) determines that said transmission auxiliary torque is not greater than zero; and (h8) controlling ignition of said engine according to said spark retardation amount.

Claim 65

Dependent Claim 51 words

A method as claimed in claim 59, wherein said step (e) comprises the steps of: (e1) calculating an intermediate transmission ratio changing speed based on said objective transmission ratio; and (e2) correcting said intermediate transmission ratio changing speed to produce said transmission ratio changing speed based on said spark retardation amount.

Claim 66

Dependent Claim 60 words

A method as claimed in claim 49, herein said step (h) includes the step of (h4) calculating a required output corresponding to said detected driving conditions; said step (h1) calculates said required torque based on said required output; and said step (h) further includes the step of (h5) correcting said required output based on said objective transmission ratio changing speed.

Claim 67

Dependent Claim 39 words

A method as claimed in claim 64, wherein said step (a) includes the step of (a1) detecting an operational amount of a driver operable member; and said step (h4) calculates said required output based on said detected operational amount.

Claim 68

Dependent Claim 126 words

A method as claimed in claim 49, wherein said step (h2) comprises the steps of: (h21) determining a maximum spare torque, based on said detected driving conditions; (h22) calculating an actual torque based on said detected driving conditions; (h23) calculating a comparison torque based on said actual torque and said transmission auxiliary torque; (h24) determining whether said comparison torque is smaller than said maximum spare torque; (h25) calculating said objective engine torque from said required torque and said transmission auxiliary torque when said step (h24) determines that said comparison torque is smaller than said maximum spare torque; and (h26) determining said objective engine torque as said maximum spare torque when said step (h24) determines that said comparison torque is not smaller than said maximum spare torque.

Claim 69

Dependent Claim 113 words

A method as claimed in claim 48, wherein said step (e) comprises the steps of: (e1) determining a temporal transmission ratio changing speed based on said objective transmission ratio; (e2) calculating a transmission shock index from said temporal transmission ratio changing speed; (e3) determining if said transmission shock index is within an allowable range; (e4) calculating said transmission ratio changing speed based on said actual transmission ratio when said step (e3) determines that said transmission shock index is not within said allowable range; and (e5) determining said transmission ratio changing speed as said temporal transmission ratio changing speed when said step (e3) determines that said transmission shock index is within said allowable range.

Claim 70

Dependent Claim 136 words

A method as claimed in claim 67, wherein said step (h2) comprises the steps of: (h21) determining a maximum spare torque; (h22) calculating an actual torque; (h23) calculating a comparison torque based on said actual torque and said transmission auxiliary torque; (h24) determining whether said comparison torque is smaller than said maximum spare torque; (h25) calculating said objective engine torque from said required engine torque and said transmission auxiliary torque when said step (h24) determines that said comparison torque is smaller than said maximum spare torque; (h26) determining said objective engine torque as said maximum spare torque when said step (h24) determines that said comparison torque is not smaller than said maximum spare torque; and (h26) determining an undertorque when said step (h24) determines that said comparison torque is not smaller than said maximum spare torque.

Claim 71

Dependent Claim 45 words

A method as claimed in claim 68, wherein said step (e4) calculates said transmission ratio changing speed based on said actual transmission ratio changing speed ratio and said undertorque when said step (e3) determines that said transmission shock index is not within said allowable range.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-01-16	1998-07-18	1999-01-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-01-16	2002-07-18	2003-01-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-01-16	2006-07-18	2007-01-17	$7700.00	Window Closed / Lapsed

Control device for an internal combustion engine and a continuous variable transmission

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